Hi Experts!
Im trying to load-balance with route-maps and the continue statment.
The thing is it work at first, but, after few seconds/minutes, It stop working as I want.
Im doing it in GNS3 Lab with 7200 advipservices, but the real scenario is with an ASR1002X.
AS10 is publishing all those prefixes:
ip prefix-list Mitad1_Out seq 10 permit 100.154.19.0/24
ip prefix-list Mitad1_Out seq 15 permit 100.232.18.0/23
ip prefix-list Mitad1_Out seq 20 permit 100.232.19.0/24
ip prefix-list Mitad1_Out seq 25 permit 100.76.154.0/24
ip prefix-list Mitad1_Out seq 100 deny 0.0.0.0/0 le 32
!
ip prefix-list Mitad2_Out seq 30 permit 100.156.86.0/24
ip prefix-list Mitad2_Out seq 35 permit 100.156.91.0/24
ip prefix-list Mitad2_Out seq 40 permit 100.29.68.0/22
ip prefix-list Mitad2_Out seq 45 permit 100.29.68.0/23
ip prefix-list Mitad2_Out seq 50 permit 100.29.70.0/23
ip prefix-list Mitad2_Out seq 55 permit 100.69.8.0/22
ip prefix-list Mitad2_Out seq 100 deny 0.0.0.0/0 le 32
With this route-maps:
route-map AS30-OUT permit 10
match ip address prefix-list Mitad2_Out
continue 20
!
route-map AS30-OUT permit 20
match ip address prefix-list Mitad1_Out
set as-path prepend 10 10 10
!
route-map AS20-OUT permit 10
match ip address prefix-list Mitad1_Out
continue 20
!
route-map AS20-OUT permit 20
match ip address prefix-list Mitad2_Out
set as-path prepend 10 10 10
Configured as:
neighbor 10.10.10.2 activate
neighbor 10.10.10.2 next-hop-self
neighbor 10.10.10.2 route-map AS20-OUT out
neighbor 20.20.20.2 activate
neighbor 20.20.20.2 next-hop-self
neighbor 20.20.20.2 route-map AS30-OUT out
In the AS40 in the first moment I recieve the routing table as I want:
*> 100.154.19.0/24 30.30.30.1 0 20 10 i
*> 100.232.18.0/23 30.30.30.1 0 20 10 i
*> 100.76.154.0/24 30.30.30.1 0 20 10 i
*> 100.156.86.0/24 40.40.40.1 0 30 10 i
* 30.30.30.1 0 20 10 10 10 10 i
*> 100.156.91.0/24 40.40.40.1 0 30 10 i
* 30.30.30.1 0 20 10 10 10 10 i
*> 100.29.68.0/23 40.40.40.1 0 30 10 i
* 30.30.30.1 0 20 10 10 10 10 i
*> 100.29.68.0/22 40.40.40.1 0 30 10 i
* 30.30.30.1 0 20 10 10 10 10 i
Network Next Hop Metric LocPrf Weight Path
*> 100.29.70.0/23 40.40.40.1 0 30 10 i
* 30.30.30.1 0 20 10 10 10 10 i
*> 100.69.8.0/22 40.40.40.1 0 30 10 i
* 30.30.30.1 0 20 10 10 10 10 i
After a while, the bgp table changes to that:
*> 100.154.19.0/24 30.30.30.1 0 20 10 i
*> 100.232.18.0/23 30.30.30.1 0 20 10 i
*> 100.76.154.0/24 30.30.30.1 0 20 10 i
*> 100.156.86.0/24 40.40.40.1 0 30 10 i
*> 100.156.91.0/24 40.40.40.1 0 30 10 i
*> 100.29.68.0/23 40.40.40.1 0 30 10 i
*> 100.29.68.0/22 40.40.40.1 0 30 10 i
*> 100.29.70.0/23 40.40.40.1 0 30 10 i
*> 100.69.8.0/22 40.40.40.1 0 30 10 i
I've readed about how the continue works, and as I have configured It never should work as intended, but why for the first seconds It works and then change?
Im very sorry for my english.
Thanks in advance
PS: Of course, those aren't my real prefixes, I've changed them :)
